ABSTRACT
Wastes treated by stabilization/solidification (S/S) may originate from a great variety of industrial processes (Chapter 3). Inorganic wastes tend to be more compatible with cementitious binders; most wastes treated by S/S with cement contain metal contaminants in an inorganic matrix composed mainly of calcium, aluminum, and silicon, such as dusts from air pollution control systems, sludges, and soil. USEPA has acknowledged that organic compounds interfere with cement-based S/S, particularly when the organic concentration exceeds 1% total organic carbon by mass.1
However, there are numerous instances in which organic wastes have been solidified with cement,2 and many primarily inorganic wastes contain some organic contamination. In fact, although some wastes can be successfully blended or treated with cement in higher proportions than others, there are virtually no limits on their physical and chemical characteristics, other than that they must be liquids or finely divided solids at ambient temperature. Wastes may contain some of the chemicals,
